import java.util.Scanner;

public class demo02 {
    //有假
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        while (sc.hasNext()) {
            int n = sc.nextInt();
            if (n == 0) {
                return;
            }
            int count=0;
            while (n>=2){
                n=(int)Math.ceil((double) n/3);
                count++;
            }
            System.out.println(count);
        }
    }
}